// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SKIA_EXT_BENCHMARKING_CANVAS_H_
#define SKIA_EXT_BENCHMARKING_CANVAS_H_

#include <stddef.h>

#include "base/values.h"
#include "third_party/skia/include/utils/SkNWayCanvas.h"

class SkXfermode;

namespace skia {

class SK_API BenchmarkingCanvas : public SkNWayCanvas {
public:
    BenchmarkingCanvas(SkCanvas* canvas, unsigned flags = 0);
    ~BenchmarkingCanvas() override;

    enum Flags {
        kOverdrawVisualization_Flag = 0x01,
    };

    // Returns the number of draw commands executed on this canvas.
    size_t CommandCount() const;

    // Returns the list of executed draw commands.
    const base::ListValue& Commands() const;

    // Return the recorded render time (milliseconds) for a draw command index.
    double GetTime(size_t index);

protected:
    // SkCanvas overrides
    void willSave() override;
    SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
    void willRestore() override;

    void didConcat(const SkMatrix&) override;
    void didSetMatrix(const SkMatrix&) override;

    void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
    void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
    void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
    void onClipRegion(const SkRegion&, SkRegion::Op) override;

    void onDrawPaint(const SkPaint&) override;
    void onDrawPoints(PointMode, size_t count, const SkPoint pts[],
        const SkPaint&) override;
    void onDrawRect(const SkRect&, const SkPaint&) override;
    void onDrawOval(const SkRect&, const SkPaint&) override;
    void onDrawRRect(const SkRRect&, const SkPaint&) override;
    void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
    void onDrawPath(const SkPath&, const SkPaint&) override;

    void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;

    void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) override;
    void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst,
        const SkPaint*, SrcRectConstraint) override;
    void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) override;
    void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
        const SkPaint*, SrcRectConstraint) override;
    void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
        const SkPaint*) override;

    void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
        const SkPaint&) override;
    void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
        const SkPaint&) override;
    void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
        SkScalar constY, const SkPaint&) override;
    void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
        const SkMatrix* matrix, const SkPaint&) override;
    void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
        const SkPaint& paint) override;

private:
    typedef SkNWayCanvas INHERITED;

    class AutoOp;

    base::ListValue op_records_;
    unsigned flags_;
    sk_sp<SkXfermode> overdraw_xfermode_;
};

}
#endif // SKIA_EXT_BENCHMARKING_CANVAS_H
